Starter Types; Fv Non-Reversing Starter; Description; Mm3 Sequences - GE MM3 Instruction Manual

9 STARTER TYPES

9.1 FV NON-REVERSING STARTER

9 STARTER TYPES 9.1 FV NON-REVERSING STARTER

9.1.1 DESCRIPTION

This starter type is a full voltage or across-the-line non-reversing starter. When the start button is pressed the
1M coil is picked up, starting the motor and is sealed in by the 1M contact. When the stop button is pressed the
1M coil is dropped out and the motor stops.
Figure 9–1: FULL-VOLTAGE NON-REVERSING ELEMENTARY STARTER
To program the MM3 for full-voltage non-reversing starter, set:
S1 CONFIGURATION\STARTER\STARTER TYPE: FV NON-REVERSING

9.1.2 MM3 SEQUENCES

START:
1. Start command received by the MM3 (serial, switch input or faceplate).
2. Close and maintain Contactor A output relay – the motor is now across the line.
STOP/TRIP:
1. Stop command received or trip occurs.
2. Open Contactor A output relay – the motor is now off line.
When the power to the MM3 is interrupted, the contactor A output relay de-energizes, causing it to open and
9
stop the motor. The MM3 can only be wired for fail-safe operation.
If feedback is not received from the 1M contact to the Contactor A Status N.O. input on the MM3 within one
second of closing the Contactor A output relay, an OPEN CONTROL CIRCUIT alarm occurs. This causes the
Contactor A output relay to open. If feedback remains at the Contactor A Status N.O. input for more than 1 sec-
ond after opening the Contactor A output relay, a WELDED CONTACTOR alarm occurs.
GE Power Management MM3 Motor Manager 3 9-1